u using it in fruity???? when i edit the synth patch in FL and im pressing the pc keyboard to make sounds it stops working..... i dont have to reset it tho, just minimise the synth gui, so your back to sampler/step sequencer view, click on the selection light bettween the sampler and step sequencer buttons and it should work again
its a pain in the arse making presets in FL without a midi keyboard, when im making presets i'll open z3ta in standalone mode then i can fiddle with the keyboard as much as i like without the sound stopping